Explore The Dark is just one page of rules (front and back) for players and referee. I love games that have a tight set of rules, let you get started quickly and stay out of the way when playing. This is why I've been hooked on postcard and micro boardgames these past few years.

However, I've discovered that TTRPGs can do the same thing. Inspirational examples for Explore The Dark include Into The Odd by Chris McDowall, Eleventh Beast by Exeunt Press, and pretty much everything by Nate Trieme (aka Highland Paranormal Society).